Acquisitions and Strategic Transaction Expenses Hospira (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Proceeds from Issuance of Debt	$ 75,000	$ 0	$ 0
Business Combination, Contingent Consideration, Liability, Noncurrent	19,000	0	0
contingent consideration gross	225,000
Issuance of common stock for acquisitions	413,139	0	0
Bargain Purchase Gain	70,890	$ 1,456	$ 0
Hospira [Member]
Business Acquisition [Line Items]
Payment to acquire business, net of working capital adjustments	$ 180,785
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Payments to Acquire Businesses, Gross	$ 260,000
Proceeds from Issuance of Debt	75,000
Business Combination, Contingent Consideration, Liability, Noncurrent	$ 19,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	3,200
contingent consideration gross	$ 225,000
Earn out Target	$ 1,000,000
Business Acquisition, Share Price	$ 140.75
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 450,400
Discount on equity issued as consideration	37,261
Issuance of common stock for acquisitions	413,139
Business Combination, Consideration Transferred	687,924
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	31,082
Business Combination, Acquired Receivable, Fair Value	362
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	417,622
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	13,911
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	288,134
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	131,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	25,080
Bargain Purchase Gain	70,890
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	29,270
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	12,381
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	47,936
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	67,170
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 783,894
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years
Customer Relationships [Member] | Hospira [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 48,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years
Pumps and dedicated sets [Domain] | Hospira [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 44,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
developed technology-consumables [Domain] | Hospira [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 34,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	12 years
In Process Research and Development [Member] | Hospira [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	$ 5,000
Minimum [Member]
Business Acquisition [Line Items]
Adjusted EBITDA	35,000
Maximum [Member]
Business Acquisition [Line Items]
Adjusted EBITDA	$ 40,000